Display panel and display device

Abstract

Embodiments of the present application relate to the field of display technology, and in particular, to a display panel and a display device, wherein the display panel includes: a substrate; a first pixel driving circuit and a second pixel driving circuit alternately arranged on the substrate; a leakage current of a first initialization transistor in the first pixel driving circuit is less than a leakage current of a first compensation transistor; and a leakage current of a second initialization transistor in the second pixel driving circuit is greater than a leakage current of a second compensation transistor.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of display technology, and in particular, to a display panel and a display device. Background Art

[0002] With the advancement of display technology, more and more products are using displays to display content. However, displays have also become a major power-consuming component in electronic devices. To reduce display power consumption and increase battery life, most current technologies use technologies that reduce refresh rates, such as AOD (Always on Display) mode.

[0003] However, in the process of implementing the present invention, the inventors discovered that there are at least the following problems in the prior art: as the refresh rate decreases, the display screen experiences a low-frequency flickering problem. Summary of the Invention

[0004] In order to solve the above problems, embodiments of the present application provide a display panel and a display device to at least partially solve the above problems.

[0005] According to a first aspect of an embodiment of the present application, there is provided a display panel, comprising:

[0006] substrate;

[0007] a first pixel driving circuit and a second pixel driving circuit alternately arranged on the substrate;

[0008] The first pixel driving circuit includes:

[0009] A first driving transistor, used for driving the light emitting element to emit light;

[0010] a first initialization transistor connected between an initialization voltage and the gate of the first driving transistor, and configured to apply the initialization voltage to the gate of the first driving transistor;

[0011] a first compensation transistor connected between the gate of the first driving transistor and the first electrode of the first driving transistor, and configured to enable the first driving transistor to form a diode structure when turned on, wherein a leakage current of the first initialization transistor is smaller than a leakage current of the first compensation transistor;

[0012] The second pixel driving circuit includes:

[0013] A second driving transistor, used for driving the light emitting element to emit light;

[0014] a second initialization transistor connected between the initialization voltage and the gate of the second driving transistor, and configured to apply the initialization voltage to the gate of the second driving transistor;

[0015] The second compensation transistor is connected between the gate and the first electrode of the second driving transistor, and is used to make the second driving transistor form a diode structure when turned on, wherein the leakage current of the second initialization transistor is greater than the leakage current of the second compensation transistor.

[0016] In a possible implementation, when the first driving transistor drives the light-emitting element to emit light, the gate voltage of the first driving transistor increases, and when the second driving transistor drives the light-emitting element to emit light, the gate voltage of the second driving transistor decreases.

[0017] In a possible implementation, the first initialization transistor and the first compensation transistor include dual-gate transistors or multi-gate transistors.

[0018] In a possible implementation, the second initialization transistor includes a single-gate transistor or a double-gate transistor, and the second compensation transistor includes a double-gate transistor or a multi-gate transistor, wherein the number of gates of the second initialization transistor is less than the number of gates of the second compensation transistor.

[0019] In a possible implementation, the second initialization transistor is a single-gate transistor, and the second compensation transistor is a double-gate transistor.

[0020] In a possible implementation manner, the first pixel driving circuit and the second pixel driving circuit are alternately arranged in a display area on a substrate.

[0021] In a possible implementation, the first pixel driving circuit and the second pixel driving circuit are arranged alternately along a row direction and / or alternately along a column direction.

[0022] In a possible implementation, the ratio of the number of the first pixel driving circuits to the number of the second pixel driving circuits is 1:10 to 10:1.

[0023] In one possible implementation, the first pixel driving circuit and the second pixel driving circuit are alternately arranged along the row direction and alternately arranged along the column direction, the row direction is perpendicular to the column direction, and the number ratio of the first pixel driving circuit and the second pixel driving circuit is 1:1.

[0024] According to a second aspect of the embodiments of the present application, a display device is provided, including: the display panel as described above.

[0025] In an embodiment of the present application, the first pixel driving circuit and the second pixel driving circuit are interspersed on the substrate, and the leakage current of the first initialization transistor in the first pixel driving circuit is smaller than the leakage current of the first compensation transistor, and the leakage current of the second initialization transistor in the second pixel driving circuit is larger than the leakage current of the second compensation transistor. When the first pixel driving circuit drives the light-emitting element to emit light, the gate voltage of the first driving transistor increases, and when the second pixel driving circuit drives the light-emitting element to emit light, the gate voltage of the second driving transistor decreases. Thus, the brightness changes corresponding to the alternately arranged first pixel driving circuit and the second pixel driving circuit are complementary, thereby weakening the flicker effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] Figure 1 is a structural diagram of a display panel;

[0028] Figure 2 Schematic diagram of the structure of a display panel including a first pixel driving circuit and a second pixel driving circuit alternately arranged along a row direction;

[0029] Figure 3 1 is a schematic structural diagram of a display panel including first pixel driving circuits and second pixel driving circuits alternately arranged along a column direction;

[0030] Figure 4 Schematic diagram of a display panel including a first pixel driving circuit and a second pixel driving circuit alternately arranged along a row direction and a column direction;

[0031] Figure 5 A schematic structural diagram of a basic pixel driving circuit;

[0032] Figure 6 is a signal timing diagram of a pixel driving circuit;

[0033] Figure 7 is a structural schematic diagram of a first pixel driving circuit;

[0034] Figure 8 is a structural schematic diagram of a second pixel driving circuit;

[0035] Figure 9 Schematic diagram of simulation test results obtained by simulating the first pixel driving circuit and the second pixel driving circuit respectively;

[0036] Figure 10 A schematic diagram of simulation test results of the solution provided in this embodiment and a general pixel driving circuit is shown. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field should fall within the scope of protection of the embodiments of the present application.

[0038] As previously mentioned, as the refresh rate decreases, displays experience low-frequency flicker. Research has found that a lower refresh rate increases the duration of a frame. The pixel driver circuit of a display contains transistors used for initialization or compensation. During the light-emitting process, leakage current from these transistors causes the gate voltage of the driver transistor to vary within a frame. As the frame length increases, the gate voltage of the driver transistor varies significantly, causing the current used to control the light-emitting element to vary significantly, resulting in visual flicker.

[0039] In view of this, an embodiment of the present application provides a display panel to reduce the flicker problem caused by the lengthening of a frame time.

[0040] See also Figure 1 , provides a structural diagram of a display panel, such as Figure 1 As shown, it includes: a substrate 101, a first pixel driving circuit 102 and a second pixel driving circuit 103 alternately arranged on the substrate 101.

[0041] The leakage current is the leakage current flowing between the first electrode and the second electrode of the transistor when the transistor is in the off state.

[0042] In the solution provided in this embodiment, the leakage current of the first initialization transistor in the first pixel driving circuit 102 is less than the leakage current of the first compensation transistor, and the leakage current of the second initialization transistor in the second pixel driving circuit 103 is greater than the leakage current of the second compensation transistor, so that the gate voltage of the first driving transistor rises when the first driving transistor drives the light-emitting element to emit light, and the gate voltage of the second driving transistor drops when the second driving transistor drives the light-emitting element to emit light, resulting in opposite changes in the gate voltages of the driving transistors of the first pixel driving circuit 102 and the second pixel driving circuit 103 when emitting light, thereby complementing the corresponding brightness changes of the alternating first pixel driving circuit 102 and the second pixel driving circuit 103, thereby weakening the flicker effect.

[0043] In the solution provided in this embodiment, the light-emitting element may be an organic light-emitting element, a light-emitting element of a liquid crystal display, or a light-emitting element of other display panels, all of which are within the protection scope of this application.

[0044] It should be noted that, in this embodiment, the arrangement of the first pixel driving circuit 102 and the second pixel driving circuit 103 on the display panel is not limited, as long as the two are alternately arranged and can achieve brightness complementarity.

[0045] Optionally, in this embodiment, the first pixel driving circuit 102 and the second pixel driving circuit 103 are alternately arranged in the display area on the substrate. Since the solution provided in this embodiment mainly performs complementary brightness changes and weakens the visual flicker effect, the first pixel driving circuit 102 and the second pixel driving circuit 103 are alternately arranged in the display area (Active Area, AA).

[0046] Optionally, in this embodiment, the first pixel driving circuit 102 and the second pixel driving circuit 103 are arranged alternately along the row direction and / or alternately along the column direction.

[0047] By setting different alternating modes, different screen display requirements can be met. For example, in a horizontal display screen, the first pixel driving circuit 102 and the second pixel driving circuit 103 arranged alternately along the row direction are applied; in a vertical display screen, the first pixel driving circuit 102 and the second pixel driving circuit 103 arranged alternately along the column direction are applied; in a square, circular or other special-shaped display screen, the first pixel driving circuit 102 and the second pixel driving circuit 103 arranged alternately along the row direction and along the column direction are applied.

[0048] For example, the alternating arrangement along the row direction can be, for example: two adjacent pixel driving circuits along the row direction are different; or two pixel driving circuits are grouped together along the row direction, the pixel driving circuits in the group are the same, and the two adjacent groups of pixel driving circuits are different; or the alternating arrangement along the row direction is in the form of one first pixel driving circuit 102, two second pixel driving circuits 103, etc., all of which are within the scope of protection of the present application.

[0049] See also Figure 2 , shows a first pixel driving circuit 102 and a second pixel driving circuit 103 provided in this embodiment and arranged alternately along the row direction, Figure 2 A second pixel driving circuit 103 is alternately arranged every other first pixel driving circuit 102 along the row direction.

[0050] The alternating arrangement along the column direction is similar to the alternating arrangement along the row direction, and will not be described in detail. Figure 3 , shows a first pixel driving circuit 102 and a second pixel driving circuit 103 alternately arranged along a column direction provided by this embodiment, Figure 2 A second pixel driving circuit 103 is alternately arranged every two first pixel driving circuits 102 along the column direction.

[0051] The alternating arrangement along the row direction and along the column direction may be that the first pixel driving circuit 102 and the second pixel driving circuit 103 are alternately distributed in both the row direction and the column direction. For example, a plurality of adjacent light-emitting elements are divided into a group, and the pixel driving circuits of two adjacent groups of light-emitting elements are different. It should be noted that the above is only an example and is not intended to limit the present embodiment.

[0052] See also Figure 4 , shows a first pixel driving circuit 102 and a second pixel driving circuit 103 provided in this embodiment, which are alternately arranged along the row direction and the column direction. Figure 4 In the embodiment, a second pixel driving circuit 103 is provided every other first pixel driving circuit 102 in the row direction and the column direction.

[0053] Optionally, in this embodiment, the ratio of the number of the first pixel driving circuit 102 to the second pixel driving circuit 103 is 1:10 to 10:1. By setting the ratio of the number of the first pixel driving circuit 102 to the second pixel driving circuit 103 to 1:10 to 10:1, it can be ensured that the brightness changes corresponding to the first pixel driving circuit 102 and the second pixel driving circuit 103 can complement each other, thereby weakening the flicker effect; and the number of one of the first pixel driving circuit 102 or the second pixel driving circuit 103 can be reduced. Those skilled in the art can selectively reduce the more complex one of the first pixel driving circuit 102 or the second pixel driving circuit 103, thereby reducing the difficulty of manufacturing the display panel.

[0054] Optionally, in this embodiment, when the first pixel driving circuit 102 and the second pixel driving circuit 103 are arranged alternately along the row direction and alternately along the column direction, the ratio of the number of the first pixel driving circuit 102 and the second pixel driving circuit 103 is 1:1, thereby achieving a better complementary effect. For example, Figure 4 shown.

[0055] The following describes the specific circuit structures of the first pixel driving circuit 102 and the second pixel driving circuit 103 .

[0056] In order to more clearly explain the first pixel driving circuit 102 and the second pixel driving circuit 103, the present application first describes a basic pixel driving circuit. This embodiment provides a basic pixel driving circuit, and the first pixel driving circuit 102 and the second pixel driving circuit 103 can be circuits obtained by modifying or adjusting the basic pixel driving circuit. It should be noted that the solution provided in this embodiment is only illustrative of one pixel driving circuit as an example, and pixel driving circuits of other structures are also within the scope of protection of this application.

[0057] like Figure 5 As shown, the basic pixel driving circuit may include a driving transistor T1, a data writing transistor T2, a compensation transistor T3, an initialization transistor T4, a first light emission control transistor T5 and a second light emission control transistor T6, a reset transistor T7, and a storage capacitor C1.

[0058] The first emission control transistor T5, the driving transistor T1 and the second emission control transistor T6 are connected in series between the first power supply voltage ELVDD and the second power supply voltage ELVSS. The gates of the first emission control transistor T5 and the second emission control transistor T6 are connected to the emission control signal input terminal EM.

[0059] The gate of the data writing transistor T2 is connected to the second scanning signal input terminal S2, the first electrode of the data writing transistor T2 is connected to the second electrode of the driving transistor T1, the second electrode of the data writing transistor T2 is connected to the data signal input terminal Vdata, and the second electrode of the driving transistor T1 is close to one electrode of the first power supply voltage ELVDD.

[0060] The gate of the compensation transistor T3 is connected to the second scan signal input terminal S2 and is connected between the gate and the first electrode of the driving transistor, so as to enable the driving transistor to form a diode structure when turned on.

[0061] The gate of the initialization transistor T4 is connected to the first scan signal input terminal S1, the first electrode of the data write transistor T2 is connected to the initialization signal input terminal Vrefn, and the second electrode of the data write transistor T2 is connected to the gate of the driving transistor T1, for applying the initialization voltage of the initialization signal input terminal Vrefn to the gate of the first driving transistor.

[0062] The gate of the reset transistor T7 is connected to the third scan signal input terminal S3, and the first electrode of the reset transistor T7 is connected to the initialization signal input terminal Vrefn, and the second electrode of the reset transistor T7 is connected to the light-emitting element, and is used to apply the initialization voltage of the initialization signal input terminal Vrefn to the light-emitting element to reset the light-emitting element.

[0063] The storage capacitor C1 is connected between the driving transistor T1 and the first power voltage ELVDD.

[0064] The working process of the pixel driving circuit may include an initialization phase, a data writing phase, and a light emitting phase. The signal timing diagram of the working process may be as follows: Figure 6 As shown, Figure 6 1 indicates the initialization phase, 2 indicates the data writing phase, and 3 indicates the light emitting phase.

[0065] Specifically, in the initialization phase, the first scanning signal S1 connected to the first scanning signal input terminal may be used to control the initialization transistor T4 to be turned on, so as to initialize the gate of the driving transistor T1.

[0066] During the data writing phase, the data writing transistor T2 and the compensation transistor T3 can be turned on by the second scanning signal S2 connected to the second scanning signal input terminal. At this time, the data signal is transmitted to the second electrode of the driving transistor T1 through the data signal input terminal Vdata, and is connected to the storage capacitor C1 through the compensation transistor T3. At this time, the driving transistor T1 forms a diode structure, so that the difference between the data signal Vdata and the threshold voltage of the driving transistor T1 can be stored in the storage capacitor C1.

[0067] In the light-emitting stage, the first light-emitting control transistor T5 and the second light-emitting control transistor T6 are turned on by the light-emitting control signal input terminal EM. At this time, the driving transistor T1 forms a driving current according to the gate potential (that is, the voltage value of the end of the storage capacitor C1 away from ELVSS), and the driving current flows through the light-emitting element, causing the light-emitting element to emit light.

[0068] In the light emitting stage, although the compensation transistor T3 and the initialization transistor T4 are in the off state, leakage current exists in the compensation transistor T3 and the initialization transistor T4 , causing the gate potential of the driving transistor T1 to change.

[0069] On the basis of the above pixel driving circuit, the compensation transistor T3 and the initialization transistor T4 can be parameter-adjusted or structurally adjusted to adjust the leakage current of the compensation transistor T3 and the initialization transistor T4, thereby obtaining a first pixel driving circuit 102 and a second pixel driving circuit 103 in which the leakage current of the initialization transistor T4 and the compensation transistor T3 have opposite magnitudes.

[0070] Specifically, see Figure 5 , shows the leakage current in the pixel driving circuit during the light-emitting process, which may include a first leakage current I1 flowing from the compensation transistor T3 to the gate of the driving transistor T1, and a second leakage current I2 flowing from the gate of the driving transistor T1 to the initialization transistor T4.

[0071] If Figure 5 The first pixel driving circuit 102 is obtained based on the pixel driving circuit shown in FIG. Figure 5 The driving transistor T1 is a first driving transistor, which is used to drive the light-emitting element to emit light; the initialization transistor T4 is a first initialization transistor, which is connected between the initialization voltage and the gate of the first driving transistor, and is used to apply the initialization voltage to the gate of the first driving transistor; the compensation transistor T3 is a first compensation transistor, which is connected between the gate of the first driving transistor and the first electrode of the first driving transistor, and is used to make the first driving transistor form a diode structure when it is turned on.

[0072] If Figure 5 The first pixel driving circuit 102 is obtained based on the pixel driving circuit shown, and the leakage current of the first initialization transistor T4 is smaller than the leakage current of the first compensation transistor T3, so that the gate voltage of the first driving transistor T1 increases when driving the light emitting element to emit light through the leakage current of the first compensation transistor T3.

[0073] Specifically, if the magnitude of the second leakage current I2 is smaller than the magnitude of the first leakage current I1, the gate voltage Vgate of the first driving transistor T1 is increased mainly through the first leakage current I1, and the difference between the gate voltage Vgate and the first power supply voltage ELVDD gradually decreases, thereby reducing the current value flowing from the first driving transistor T1 to the light-emitting element, and the brightness of the light-emitting element gradually decreases.

[0074] Similarly, if Figure 5 The second pixel driving circuit 103 is obtained based on the pixel driving circuit shown in FIG. Figure 5 The driving transistor T1 is a second driving transistor, which is used to drive the light-emitting element to emit light; the initialization transistor T4 is a second initialization transistor, which is used to apply an initialization voltage to the gate of the second driving transistor T1; the compensation transistor T3 is a second compensation transistor, which is connected between the gate and the first electrode of the second driving transistor, and is used to make the second driving transistor form a diode structure when it is turned on.

[0075] When implemented as a second pixel driving circuit 103, the magnitude of the second leakage current I2 is greater than the magnitude of the first leakage current I1, and the gate voltage Vgate of the second driving transistor T1 is mainly reduced through the second leakage current I2, and the difference between the gate voltage Vgate and the first power supply voltage ELVDD gradually increases, thereby causing the current value flowing from the second driving transistor to the light-emitting element to increase, and the brightness of the light-emitting element to gradually increase.

[0076] Specifically, in this embodiment, the first pixel driving circuit 102 and the second pixel driving circuit 103 can be obtained by adjusting the structure of the initialization transistor or the compensation transistor.

[0077] Specifically, the first initialization transistor and the first compensation transistor in the first pixel driving circuit 102 may include dual-gate transistors or multi-gate transistors, thereby improving the stability of the first pixel driving circuit 102 and the electronic noise suppression capability.

[0078] Figure 7 exemplarily shows a structural diagram of a first pixel driving circuit 102, Figure 7 The first initialization transistor and the first compensation transistor are both dual-gate transistors. During the operation of the first pixel driving circuit 102, it should be noted that: Figure 7 Only a dual-gate transistor is used as an example. Other solutions that can make the leakage current of the first initialization transistor smaller than the leakage current of the first compensation transistor are also within the protection scope of this application. For example, both the first initialization transistor and the first compensation transistor are tri-gate transistors.

[0079] Specifically, in this embodiment, Figure 7 As shown, the first compensation transistor of the first pixel driving circuit 102 is a first dual-gate transistor, which is labeled T3-1 and T3-2 in the figure. The first dual-gate transistor is connected between the gate of the first driving transistor and the first electrode of the first driving transistor; the first initialization transistor is a second dual-gate transistor. Figure 7 Indicated by T4-1 and T4-2, the second dual-gate transistor is connected between the initialization voltage and the gate of the first driving transistor; the leakage current of the second dual-gate transistor is smaller than the leakage current of the first dual-gate transistor, so that the gate voltage of the first driving transistor rises when driving the light-emitting element to emit light.

[0080] During the operation of the pixel circuit, when the first and second dual-gate transistors change from an on state to an off state, due to the influence of parasitic capacitance, the jump in the gate potential of each transistor is coupled to the intermediate node of the dual-gate transistors, causing the potential of the intermediate node of the dual-gate transistors to jump. Specifically, in the light-emitting phase, VTFT_3>Vgate, and Vrefn<VTFT_4<Vgate, and the voltage difference between VTFT_3 and Vgate is greater than the voltage difference between Vgate and VTFT_4, where VTFT_3 is the voltage of the intermediate node of the first dual-gate transistor, that is, the voltage of the node between T3-1 and T3-2, Vgate is the gate voltage of the first drive transistor, Vrefn is the initialization voltage, and VTFT_4 is the voltage of the intermediate node of the second dual-gate transistor, that is, the voltage of the node between T4-1 and T4-2.

[0081] At this time, the voltage difference between the middle node voltage of the first dual-gate transistor and the gate voltage of the first driving transistor is greater than the voltage difference between the middle node voltage of the second dual-gate transistor and the gate voltage of the first driving transistor. The first leakage current flowing from the middle node of the first dual-gate transistor to the gate of the driving transistor is greater than the second leakage current flowing from the gate of the first driving transistor to the middle node of the second dual-gate transistor, causing the gate voltage of the first driving transistor to rise.

[0082] Specifically, the second initialization transistor in the second pixel driving circuit 103 includes a single-gate transistor or a double-gate transistor, and the second compensation transistor includes a double-gate transistor or a multi-gate transistor, wherein the number of gates of the second initialization transistor is less than the number of gates of the second compensation transistor, thereby making the leakage current of the second initialization transistor greater than the leakage current of the second compensation transistor.

[0083] Figure 8 exemplarily shows a structural diagram of a second pixel driving circuit, Figure 8 In the embodiment, the second initialization transistor in the second pixel driving circuit 103 is a dual-gate transistor and the second compensation transistor is a single-gate transistor. The scheme provided in this embodiment uses a single-gate transistor as the second initialization transistor so that the leakage current of the second initialization transistor is greater than the leakage current of the second compensation transistor. This is simple to implement and can minimize the area occupied by the pixel driving circuit.

[0084] Specifically, in this embodiment, Figure 8 As shown, the second initialization transistor of the second pixel driving circuit 103 is a single-gate transistor, which is connected between the initialization voltage and the gate of the second driving transistor to apply the initialization voltage to the gate of the second driving transistor; the second compensation transistor of the second pixel driving circuit 103 is a third double-gate transistor, the second electrode of the third double-gate transistor is connected to the first electrode of the second driving transistor, and the first electrode of the third double-gate transistor is connected to the gate of the second driving transistor; the leakage current of the single-gate transistor is greater than the leakage current of the third double-gate transistor, so that the gate voltage of the second driving transistor drops when driving the light-emitting element to emit light.

[0085] Specifically, in the light emitting stage, VTFT_3>Vgate, and Vrefn<Vgate, wherein VTFT_3 is the node voltage in the middle of the third dual-gate transistor, Vgate is the gate voltage of the second driving transistor, and Vrefn is the initialization voltage.

[0086] At this time, since Vrefn is less than Vgate, and the voltage difference between Vrefn and Vgate is larger than the voltage difference between VTFT_3 and Vgate, the leakage current flowing through the single-gate transistor is larger, so that the leakage current flowing from the gate of the second driving transistor to the single-gate transistor is greater than the leakage current flowing from the middle node of the third double-gate transistor to the gate of the second driving transistor, causing the gate voltage of the second driving transistor to drop.

[0087] The solution provided in this embodiment alternately arranges the first pixel driving circuit 102 and the second pixel driving circuit 103 on the substrate, and increases the gate voltage of the first driving transistor in the first pixel driving circuit 102, and decreases the gate voltage of the second driving transistor in the second pixel driving circuit 103, so that the brightness changes caused by the first pixel driving circuit 102 and the second pixel driving circuit 103 are opposite, so that the brightness changes corresponding to the first pixel driving circuit 102 and the second pixel driving circuit 103 complement each other, thereby weakening the flicker effect.

[0088] Simulation experiment

[0089] In this embodiment, a simulation test is performed on the pixel driving circuit, and the test results obtained are as follows:

[0090] See also Figure 9 , which shows simulation test results obtained by respectively performing simulation tests on the first pixel driving circuit 102 and the second pixel driving circuit 103 .

[0091] The simulation test results are shown in Table 1 below:

[0092]

[0093]

[0094] Table 1

[0095] Figure 9 Take the OLED display panel with a refresh rate of 5Hz as an example. Figure 9 The horizontal axis is time, the unit is second s, T1 and T2 are two measurement time points within one frame time; Figure 9 The vertical axis is the current value, the unit is A (ampere). Figure 9 As shown, the current value of the first pixel driving circuit 102 gradually decreases, and the current value of the second pixel driving circuit 103 gradually increases.

[0096] Assuming that the ratio of the number of the first pixel driving circuit 102 to the number of the second pixel driving circuit 103 is 1:1, the current value variation of this solution can be obtained by averaging the current values ​​in the above table.

[0097] Figure 10 The simulation test results of the solution provided by the embodiment of the present application and the conventional pixel driving circuit are shown. Figure 10 As shown, the “original solution” corresponds to the simulation test results of the conventional pixel driving circuit, and the “present solution” corresponds to the simulation test results of the display panel provided by the embodiment of the present application. The simulation test results of the present solution are obtained by comparing the results of the conventional pixel driving circuit with the results of the present solution. Figure 9 The average current value of circuit 1 and circuit 2 is obtained.

[0098] The simulation test results are shown in Table 2 below:

[0099]

[0100] Table 2

[0101] In comparison, for the current variation within one frame, the 1.54 nA of this solution is smaller than the 6.45 nA of the original solution. This shows that the possibility of flickering is reduced in this solution.

[0102] In addition, an embodiment of the present invention further provides a display panel, which includes the display panel provided by the above embodiment.

[0103] Specifically, if the display screen panel is an OLED, the display panel may include a substrate and a first pixel driving circuit and a second pixel driving circuit arranged on the substrate. It may also include a light-emitting device layer, which includes an anode, a light-emitting functional layer, and a cathode stacked on the substrate.

[0104] The anode is used to inject holes when current flows through it, while the cathode is used to inject electrons when current flows through it. The light-emitting functional layer is used to generate light under the action of electrons and holes.

[0105] An embodiment of the present invention further provides a display device, comprising: the display panel as described above. The display device can be any device capable of displaying, such as a mobile phone, a wearable device, a computer, or a television.

[0106] It should also be noted that for the sake of illustration, the structures in the various figures in this application are not necessarily drawn according to the actual proportions. It should be understood that the various figures do not constitute any limitation on the embodiments of this application.

[0107] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] It should be noted that the term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0109] It should be noted that the modifications of "one" and "multiple" mentioned in this application are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and not to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: include: substrate; a first pixel driving circuit and a second pixel driving circuit alternately arranged on the substrate; The first pixel driving circuit includes: A first driving transistor, used for driving the light emitting element to emit light; a first initialization transistor connected between an initialization voltage and the gate of the first driving transistor, and configured to apply the initialization voltage to the gate of the first driving transistor; a first compensation transistor connected between the gate of the first driving transistor and the first electrode of the first driving transistor, and configured to enable the first driving transistor to form a diode structure when turned on, wherein a leakage current of the first initialization transistor is smaller than a leakage current of the first compensation transistor; The second pixel driving circuit includes: A second driving transistor, used for driving the light emitting element to emit light; a second initialization transistor connected between the initialization voltage and the gate of the second driving transistor, and configured to apply the initialization voltage to the gate of the second driving transistor; The second compensation transistor is connected between the gate and the first electrode of the second driving transistor, and is used to make the second driving transistor form a diode structure when turned on, wherein the leakage current of the second initialization transistor is greater than the leakage current of the second compensation transistor.

2. The display panel according to claim 1, wherein: When the first driving transistor drives the light emitting element to emit light, a gate voltage of the first driving transistor increases, and when the second driving transistor drives the light emitting element to emit light, a gate voltage of the second driving transistor decreases.

3. The display panel according to claim 1, wherein The first initialization transistor and the first compensation transistor both include double-gate transistors or multi-gate transistors.

4. The display panel according to claim 1, wherein: The second initialization transistor includes a single-gate transistor or a double-gate transistor, and the second compensation transistor includes a double-gate transistor or a multi-gate transistor, wherein the number of gates of the second initialization transistor is less than the number of gates of the second compensation transistor.

5. The display panel according to claim 4, wherein: The second initialization transistor is a single-gate transistor, and the second compensation transistor is a double-gate transistor.

6. The display panel according to claim 1, wherein: The first pixel driving circuits and the second pixel driving circuits are alternately arranged in a display area on a substrate.

7. The display panel according to claim 6, wherein: The first pixel driving circuit and the second pixel driving circuit are arranged alternately along a row direction and / or alternately along a column direction.

8. The display panel according to any one of claims 1 to 7, wherein: The ratio of the number of the first pixel driving circuits to the number of the second pixel driving circuits is 1:10 to 10:

1.

9. The display panel according to claim 7, wherein: The first pixel driving circuits and the second pixel driving circuits are alternately arranged along the row direction and alternately arranged along the column direction, and the ratio of the number of the first pixel driving circuits to the second pixel driving circuits is 1:

1.

10. A display device, characterized in that: include: The display panel according to any one of claims 1 to 9.

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